Answer:
A. Decides that she will give it some more thought and do some research
Explanation:
Let's explain each choice and why it is correct or not
A. Decides that she will give it some more thought and do some research
This is what a good manager and a critical thinker does. So this is the correct choice.
B. Dismisses the idea because her assistant is not the boss
A critical thinker does not dismmiss the idea of her assistant.
C. Begins making the switch to telephone reminders
A critical thinker also does not take "rushed" decision.
D. Changers her telephone provider
The telephone provider has nothing to do with the suggestion.