2. The abstract is only a kind of technical data, not the original application document, so the absence of the abstract does not affect the determination of the application date.
3. If there are drawings in the main body of the instruction manual, but there are no drawings in the instruction manual or the corresponding drawings are missing, the applicant shall be notified to cancel the drawings in the main body of the instruction manual or submit the corresponding drawings within the specified time limit. Where the applicant submits the appended drawings, the date of submitting or mailing the appended drawings to the Patent Office shall be the filing date, and the examiner shall issue a notice to re-determine the filing date. The application date cancels the corresponding drawings and retains the original application date. (Review Guide 20 10, Part I, Chapter 1, 4.2, page 20 (that is, page (1- 10)))
Therefore, this question should choose C.