Though smaller than our solar system, a quasar, which looks like an ordinary star, emits more light ________ galaxy.
- A. than an entire
- B. than entire
- C. than is entire
- D. than entirely
Explanation
The comparison is between the quasar's light and the light of an entire galaxy, so than an entire galaxy completes the construction. Entire must modify the singular noun galaxy, and the other options are grammatically incomplete or illogical.