Which sentence does not correctly fix this run-on sentence? The car skidded luckily no one was near it.
a. The car skidded, luckily no one was near it.
b. The car skidded. Luckily, no one was near it.
c. The car skidded; luckily, no one was near it.
d. The car skidded, but luckily no one was near it.