A patient with an acute attack of glaucoma is treated with pilocarpine. The primary reason for its effectiveness in this condition is its:

A、actiontoterminateacetylcholinesterase;
B、slectivelyfornicotinicreceptors;
C、abilitytoinhibitsecretions,suchastears,salivaandsweat;
D、abilitytolowerintraocularpressure