You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: Bacteria with a mutation the helps resist antibiotics increase in numbers, so the mutation becomes more common.
 Question: Eric notices an decrease in antibiotic resistance in a certain bacteria. The mutation that causes the resistance has become _____ common 
 Choices: A)more 
B)less
less

Paragraph: The more branching there is in isomers, the lower the boiling and melting points are.
 Question: If Jim is trying to raise the melting point of an isomer, what should he do to the number of branching points of the isomer? 
 Choices: A)decrease them 
B)increase them
decrease them

Paragraph: As humidity increases, the water potential gradient across the inside and outside the leaf become more equal, and so the rate of transpiration decreases.
 Question: As the air becomes wetter, transpiration of a leaf will 
 Choices: A)increase 
B)decrease

decrease