Select the correct answer. Marissa is testing a hypothesis through experimentation. She believes that immersing ocean coral in carbonic acid will slow the coral’s growth. Which of these actions will prevent Marissa from introducing confounding variables into her experiment? A. She releases cement particles into a random number of the coral samples.
B. She uses three different types of coral to establish her dependent variables.
C. She treats the coral samples identically with varying levels of carbonic acid.
D. She obtains her coral samples from coral reefs surrounding different continents.

it have destructive character

they are both synthetic elements

explanation:

d

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.