Answer:
d). Joan has a high degree of trust propensity
Explanation:
According to the given context, Joan has an inherent quality to trust people. He blindly follows what other says and believe them.
The CEO of Joan's company asks them not to take any more leaves and to give more time at the office to meet the deadlines and also promised to reward those who put in extra effort in the work.
Shane did have faith in the management of his office but Joan says that he believes the CEO has asked his employees to work extra for some good reason and they will all be rewarded with incentives or gift for their effort.
Thus Joan has a very high degree of trustworthiness to all.
Therefore the answer is ---
d). Joan has a high degree of trust propensity.