The sentence describes a cause-effect relationship between the CEO's attitude and employees' feelings:
The first blank should describe a negative or distant attitude that causes concern among employees. Both (B) indifferent and (D) aloof convey detachment or lack of engagement, fitting this context well.
The second blank reflects the employees' feelings resulting from the CEO's attitude — feeling uncertain or uneasy, which matches with the negative tone of the CEO’s attitude.
Positive words such as (A) supportive, (C) enthusiastic, (E) motivating, and (F) reassuring would contradict