Which of these questions can be answered using scientific methods? who is the best author in english? should all students take the same classes? which is the tastiest flavor of ice cream? what would be the effect of a hurricane?

Option D, What would be the effect of a hurricane?

Explanation:

A scientific method explains a fact/happening in and around us with some logical backing.

Questions based on personal choices, preference or liking cannot be answered by scientific method  as logic that work for one person/case may not work for another person/case.

Of all the given question, impact of hurricane can be answered scientifically while all other questions are preference oriented question.

Hence, option D is correct.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

the answer to your question is:

c. complementary base-pairing