Can you me, , with a presentation are exams the best way to evaluate students?

They often are not.

Exams test a very specific band of knowledge and way of expressing that knowledge. This means that for students who learn differently are excluded from their ability to show their knowledge.

Instead, a teacher should state what the learning goal of the unit is and allow students to show their evidence of learning in whatever way works best for them. The teacher should use a rubric that is handed out before hand to grade the examination.

it would be d). more resources must be obtained to attain that combination of goods and services