<span>Due to bonding
interactions the nitrogenous bases on one strand of the DNA will always
bind with another base on the other strand of DNA. This is due to many
different enzymes that help DNA to take its structure</span>
First answer is A
Second answer is C
I think the answer is D. ( or supported by observations ). Because theories change over time, they both NEED to be proven, they do NOT go off of consensus, but they do NEED to be supported by observations.
I hope this helps.
