Answer: groupthink
Step-by-step explanation:
The options include:
a. groupthink
b. individual decision schemes
c. social norms
d. none of these
Groupthink occurs when a group of people agree on a particular thing without thinkiy well or evaluating the effect of their action. This normally happens due to the desire fur harmony.
In this scenario, the owners and captain of the Titanic believing the ship was invincible and could not sink despite several warnings, shows the effect of groupthink.