Though no original works of calligraphy by the ancient chinese artist wang xizhi still exist, many students have been able to retrieve specimens of his writing style by:

Many students have been able to retrieve specimens of his writing style by "making rubbings from a stone tablet".

Wang Xizhi was a Chinese calligrapher, customarily alluded to as the Sage of Calligraphy. He exceeded expectations in each content however especially in the semi-cursive content. It is said that even in his lifetime a couple of Wang's characters or his mark were inestimable. Tragically, none of his unique works remains today. Down through the ages, notwithstanding, trying students of that most essential yet most noteworthy workmanship in China, calligraphy, have replicated and protected hints of his style.

The answer is the third one or c