Researcher Lin Zhi developed a process for increasing the tensile strength—measured in gigapascals, or GPa—of silkworm ______ dissolving and reweaving the silk in a solution of iron metal ions, zinc, and sugar, Zhi increased the amount of force required to stretch it from approximately 0.5 GPa to 2 GPa.
Which choice completes the text so that it conforms to the conventions of Standard English?
Choose 1 answer:
Choose 1 answer:
(Choice A) silk and by
A
silk and by
(Choice B) silk by
B
silk by
(Choice C) silk, by
C
silk, by
(Choice D) silk. By
D
silk. By
1 answer
B) silk by