Select the correct answer.
read this summary of a scientific theory:

the universe began in an incredibly hot and dense state about 13.8 billion years ago. since this time, it has been rapidly expanding, causing galaxies to move away from one another. energy in the coldest depths of space can be explained as radiation left behind from the universe's early, more energetic state.

which of the following would require this theory to be modified?

a.
scientific observations are made that show the coldest depths of space actually lack any leftover radiation.
b.
the public becomes aware that the theory cannot accurately be regarded as a scientific law.
c.
a popular religious leader puts forward an alternative idea that does not account for all of the available evidence.
d.
a prominent scientist uses the hypothesis that the universe is much older to guide a scientific investigation.

D.  A prominent scientist uses the hypothesis that the universe is much older to guide a scientific investigation.

Explanation:

The scientific theory is the proposed description for the cause of a natural process. It is supported by the evidences that are the outcomes of the experimental trials.

A scientific theory can be modified by conducting the research using different methodology, technology and by molding the research question or hypothesis slightly different from previous research.

According to the situation, the scientific theory related to the primitive universe has given. Certain facts are available related to universe. Thus a hypothesis can be framed so as to prove the scientific theory by conducting the scientific investigation involving experimental trials. The results should be valid to be inclusive in modifying a theory.

air, water, heat and noise pollution can all be caused by producing and using technology. consuming resources - non-renewable resources, including precious metals like gold, are used to make technology

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.