Answer:
The correct answer is: Negative reinforcement.
Step-by-step explanation:
Negative reinforcement is an operant-conditioning technique that consists of the strengthening of response or behavior by eliminating or removing the stimulus that is aversive, negative or annoying to the reinforced.
When the aversive stimulus is removed the reinforced feels compelled to elicit the behavior deemed positive by the individual conducting the reinforcement.
In this particular case, Ms. Latimer told her students that if they got into groups quickly and completed some cooperative tasks (Goal behavior), they may shorten their group task time. (Removal of aversive stimulus).
This method is called b. Negative reinforcement.