Choose the sentence that includes a poorly placed modifier based on the context of the sentence.

a) Michael Crichton wrote and published his first bestseller, The Andromeda Strain, while he was still in medical school.

b) Written while he was still in medical school, The Andromeda Strain was Michael Crichton's first bestseller.

c) While he was still in medical school, Michael Crichton wrote and published his first bestseller, The Andromeda Strain.

d) Writing while he was still in medical school, The Andromeda Strain was Michael Crichton's first bestseller.