What is the right way to indicate that it is possible to finish a project on time using "can"?

The phrase "The project can be finished on time" correctly indicates the possibility of completing the project within the designated timeframe by effectively using the modal verb "can." This choice conveys a straightforward assertion that indicates both ability and potential, capturing the essence of what it means to complete the project within the established deadline.

The other options do not use "can" in a correct or suitable manner for expressing this possibility. Some may convey different meanings or types of modality, but they do not directly align with the intention behind the statement. For example, using "possible" suggests a more uncertain aspect rather than the clear possibility indicated by "can." Therefore, the selected answer provides the most accurate and direct way to express the potential to complete the project on time.