Go through the options one at a time.
Option A: Fruitful means successful and productive. This is the opposite of abortive, so it is wrong.
Option B: Familiar means well known or common. It does not relate to failure. Wrong.
Option C: Unsuccessful means not achieving the desired outcome, which is exactly what abortive means. Correct.
Option D: Consuming means using up time, energy or resources. It does not match the idea of failure. Wrong.
The only option matching the meaning of abortive is Unsuccessful, option C.