In Sherif's (1936) Experiment, Participants Were Asked to Judge How

In Sherif's (1936) experiment, participants were asked to judge how far a light on a wall was moving. The participants first made the estimates by themselves and then in the presence of others. The results showed that:

A) The participants' estimates were close at first and then they became more dissimilar over time.
B) The participants' estimates became almost identical over time, but when asked to make the estimates when they were alone again later, the participants went back to their own original estimates.
C) The participants' estimates became almost identical over time, but when asked to make the estimates again one year later, the participants went back to their own original estimates.
D) The participants' estimate became almost identical over time, and then never changed.