The charge is affected by (more than 1 may be correct) a. protons
b. mass
c. electrons
d. neutrons

protons and electrons

Explanation:

protons give off a positive charge and electrons give off a negative charge

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.