The correct answer is B. Inexperience & lack of preparation
To begin with, the word apprehension refers to a strong feeling of fear or anxiety usually related to excessive worry about something going wrong or one making mistakes. This feeling occurs in different situations including communication in which the speaker is anxious about a presentation or speech, usually because she or he is afraid of committing mistakes or being negatively judged by the audience. Additionally, in the case of communication apprehension, there are different factors that influence it including the communicative situation, the audience, the context, the expertise of the speaker and the preparation of the presentation.
In the case presented, in which Jane spent little time working on the presentation, it is possible she experiences apprehension feelings as she does not have experience in giving presentations, which means she does not feel confident and she is more prompt to making mistakes. Also, her anxiety levels might increase as she did not prepare the presentation properly and therefore she might not be ready to deliver it. Thus, Jane is likely to feel apprehensive due to her inexperience and lack of preparation.