Final answer:
Jane's friends suggest she has lost her enthusiasm for her work, aligning with the narrative's theme of lost zeal and a monotonous existence despite her desire for career progression. The correct option to fill in the blank in the given sentence is option d) Enthusiasm for her work.
Step-by-step explanation:
Jane's friends feel that her career has brought her a life that did not exist previously. She is always cheerful and has lost the enthusiasm for her work.
Throughout the passages provided, there is a recurring theme of loss of ambition or passion, yet this does not totally align with Jane's situation. Jane's example indicates a desire for progression within her current field, not a lack of it. Rather, the narrative suggests that the vibrancy of life's adventures and the expectation for great things have faded, leading to a more monotonous and unenthusiastic daily existence.
The answer reflects a perspective of diminished zeal and the dulling effects of routine, aligning most closely with an absence of enthusiasm for her current work activities.
The sentence indicates that Jane's friends feel that her career has brought her a life that did not exist previously and because of that, she is always cheerful. However, the sentence also states that she has lost something, and that is her enthusiasm for her work. This means that while her career has brought her a fulfilling life, it has also caused her to lose her previous enthusiasm for her work.
The correct option to fill in the blank in the given sentence is option d) Enthusiasm for her work.