Claim 1: The sun (solar cells) is the best energy source for the rescue team. Claim 2: Human-powered generators are the best energy source for the rescue team.
and why

Claim 2: Human-powered generators are the best energy source for the rescue team.

Explanation:

Given the following evidence:

1. Rescue mission take place in day and night and as well in a different environment, which could be rainy or cloudy

2. Solar cells that transfer energy from the sun to a battery only capable when the sun is shining.

Hence, solar cells or the sun are not reliable in all situations.

However, given that Human-powered generators can be used to transfer energy into a battery at any time (rainy or sunny, night or day) someone is there to turn the crank.

Hence, it can be concluded that Human-Powered generators are the most reliable and the best for rescue missions or teams.

i would say b. research typically uses a variety of sources

answer; /// the above statement is (false);