The Muslims are famous for having invented many things that are used by us nowadays. Algebra is for sure the most talked about of those important advancements made by them, but to answer this question, an important thing must be known: "Islam forbids the practice of monasticism and is critical of its practice."
If this practice is prohibited, it is most likely not an advancement of theirs. Also, monasticism is dated to have surfaced way before Islam.
The Answer is:
D. They invented monasticism