Identify the type of sampling used (random, systematic, convenience, stratified, or cluster sampling) in the situation described below.

In a poll conducted by a certain research center, 1118

adults were called after their telephone numbers were randomly generated by a computer, and 51 %

were able to correctly identify the president.

Which type of sampling did the research center use?

Stratified sampling

Cluster sampling

Systematic sampling

Convenience sampling

Random sampling