Step 1: Time and Cost Analysis.
Shortening project duration usually requires more resources, leading to higher direct (labor, materials) and indirect (overhead, supervision) costs.
Step 2: Summary.
Consequently, reducing project time typically increases both direct and indirect costs, making option (3) the correct choice.
Final Answer:
\[
\boxed{3. \, \text{Increasing the direct cost and the indirect cost both}}
\]