The answer (I believe) is C. Definitely not D, and B. seems unlikely too along with partnerships.
Answer:
C
Explanation:
Only statement that is subjective and is, therefore, an opinion
A President can employ a number of strategies to ensure the successful confirmation of a Supreme Court nominee.
The first is a careful and intense vetting process beforehand to ensure that there are no hidden traps that might derail the nomination.
The second is to employ a legislative "sherpa" to introduce the nominee around the Senate. This is often a former senator who has excellent relations with the other senators and who can vouch for the character and background of the nominee before the Senate.