Critic: An art historian argues that because fifteenth- century European paintings were generally more planimetric (that is, two-dimensional with no attempt at suggesting depth) than were sixteenth-century paintings, fifteenth-century painters had a greater mastery of painting than did sixteenth-century painters. However, this conclusion is wrong. Fifteenth-century European painters did not have a greater mastery of painting, for the degree to which a painting is planimetric is irrelevant to the painter' s mastery. The argument is flawed in that it
A: takes a necessary condition for an argument's being inadequate to be a sufficient condition for an argument's being inadequate
B: rejects a position merely because the proponent of the position has other objectionable views
C: bases its conclusion on two claims that contradict each other
D: rejects a position on the grounds that an inadequate argument has been made for it
Choose A, B, C or D as your solution.
D