The project manager should review the communications management plan and submit a change request if required. The communications management plan is a document that describes how the project information will be communicated to the stakeholders. It defines the communication requirements, methods, formats, frequency, and responsibilities for each stakeholder group. The project manager should review the communications management plan to understand the current communication expectations and agreements, and to identify any gaps or conflicts between the sponsor's request and the key team members' preferences. If the communications management plan needs to be updated to accommodate the sponsor's request, the project manager should submit a change request and follow the change control process. Negotiating with the key team members to send a daily report and letting the sponsor know that the project cost will increase (option A) may be a possible solution, but it should be done after reviewing the communications management plan and submitting a change request if required. Recommending to the sponsor that performance of the project be reviewed once per week (option B) may not satisfy the sponsor's needs and expectations, and may also contradict the communications management plan. Evaluating the capacity of each team member to attend daily meetings in person or virtually and reducing the time of each meeting (option D) may be a good practice, but it should also be done after reviewing the communications management plan and submitting a change request if required. References:
* PMBOK Guide, 6th edition, page 377-378, section 10.1 Plan Communications Management
* PMP Exam Prep, 10th edition, page 474, question 474, answer and explanation