Daniel was eager to apply for the engineering internship, but the application required two letters of recommendation. ______ , he asked his physics professor and his summer employer to write on his behalf.
Which choice completes the text with the most logical transition?
- A
However
- Bcheck_circle
Therefore
- C
In contrast
- D
On the other hand
Explanation
The application requirement (cause) leads to his asking for letters (effect). "Therefore" signals cause-effect. The others signal contrast.