Hi, can someone help me with this?

a) 2

b) 4; 2

c) 2

d) 2; 6; 2; 3

2a) balanced

2b) balanced

2c)balanced

Explanation:

Hope this helps!!

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation: