Question

How did scientists address the concern described in paragraph 14?

A : They removed an ice core from the lake to study it.
B : They applied chemicals to melt ice and keep the borehole open.
С : They obtained a water sample with clean technology
D : They found sediment at the bottom of the lake.

Answer 1

B? I think I’m not too sure tho

Answer 2

the answer is B

Step-by-step explanation:

they applied chemicals to melt ice and keep the borehole open