List six things that can increase fuel tank pressure.
a) High temperature, low altitude, excessive fuel, clogged air filter, faulty gas cap, engine misfire
b) Low temperature, high altitude, low fuel, clean air filter, tight gas cap, smooth engine performance
c) High temperature, high altitude, excessive fuel, dirty air filter, loose gas cap, engine knock
d) Low temperature, low altitude, low fuel, clogged air filter, loose gas cap, rough engine idle