Which definite integral represents the area of the region that is bounded by 3x - 3y² = 0 and y = 2x - 1?
a) ∫(0 to 1) [2x - 1] dx
b) ∫(0 to 1) [1 - 2x] dx
c) ∫(0 to 1) [3x - 3y²] dy
d) ∫(0 to 1) [3y² - 3x] dy