C. Is the answer for sure
I think the answer is the sun but i could be wrong
Answer: b
Explanation: I just feel like it’s the best answer choice
• Genes can contain more than one polyadenylation site, which alters the 3' of the mRNA transcript and the inclusion/exclusion of exons.
• mRNA transcripts from the same gene can be differentially spliced to include/exclude exons.