Please help. I really need the answer ASAP

The development of_ factored in the development of complex organisms.

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?