When the First Law of Thermodynamics, Q = $\Delta$ U + W, Is Applied to an Ideal Gas That

Multiple Choice

When the first law of thermodynamics, Q = $\Delta$ u + W, is applied to an ideal gas that is taken through an isobaric process,

A) Q = 0.
B) it is not true that $\Delta$ u = 0 or W = 0 or Q = 0.
C) $\Delta$ u = 0.
D) W = 0.