Chemistry help please :) Which part(s) of the reaction

Cl2(g) <=> 2Cl(g)

will be favored by an increase in the total

pressure (resulting in compression)?

1. reactants

2. Unable to determine

3. products

4. Neither is favored. (i thought it was this one bc technically the amounts of Cl are equal, but i got it wrong :/ so if someone could just explain to me why they got their answer please :))

*no weird links pls :)