Because an oversupply of computer chips has sent prices plunging, the manufacturer has announced that it will cut production by closing its factories for two days a month.
A. Because an oversupply of computer chips has sent prices plunging
B. Because of plunging prices for computer chips, which is due to an oversupply
C. Because computer chip prices have been sent plunging, which resulted from an oversupply
D. Due to plunging computer chip prices from an oversupply
E. Due to an oversupply, with the result that computer chip prices have been sent plunging

OA is A

In D, is "oversupply" unclear?