Answer:
The very bottom one
Explanation:
Thymine and Adenine always pair together while cytosine and guanine go together.
A- if her results support her hypothesis
I believe it's a. hydrogen bond
This is an invalid conclusion because pressure has nothing to do with the observations/facts she already knows. Rather, photosynthetic organisms tend to live in shallow water because they are more easily able to absorb sunlight to preform photosynthesis.
Hope this helps!