$1)$ The dotted line represents different time$$cost values while performance is fixed. The project manager may select different performance scenarios while maintaining a constant level of performance. If the project moves from condition A to condition C$,$ it has:

$$

a$)$ Increased in cost and decreased in duration.

b$)$ Increased in cost and increased in duration.

c$)$ Decreased in cost and increased in duration.

d$)$ Decreased in cost and decreased in duration.