The use of marble columns in private homes is typically associated with the Roman architectural tradition and became prominent in the late Republican period. The most widely recognized examples of marble columns in private residences can be traced to around the 1st century B.C.E.
Of the options provided, 70 B.C.E. is the most plausible date for the increased use of marble in private homes, particularly as the Roman elite began to adorn their villas with such materials.
So the best answer would be 70 B.C.E.