Barring a change in the project scope and given a Schedule Performance Index $($SPI$)$ that is $0\mathrm{.}89,$ the most reasonable inference to draw is that

a$)$ The project will likely finish later than planned.

b$)$ The project will likely cost more than planned.

c$)$ The project will likely cost less than planned.

d$)$ The project will likely be on$-$time and on$-$budget.

e$)$ The project will likely finish earlier than planned.