Question

The question is based on the following passage.

Quasars are recent additions to our body of knowledge about the physical universe.
Quasars (quasi-stellar objects) are astronomical objects that are star like in appearance
and emit non-thermal radiation, usually more ultraviolet and infrared radiation than stars.
Quasars were first discovered in the early 1960s when telescopes picked up mysterious
radio-wave emission sources that, at the time, could not be explained. Since then,
thousands of radio-emitting and radio-quiet quasars have been located.
One interesting feature of quasars is that their energy output can change by great
amounts in a short period of time. To date, scientists have not been able to account for
these energy changes.
What belief does the information in the passage support?
A. We often make significant discoveries by accident.
B. We will someday know everything about our physical universe.
C. Scientists hold the key to all knowledge about outer space.
D. Scientists are baffled by new discoveries in outer space.
E. We really know nothing about our physical universe.

Answer 1

The correct answer is D. Scientists are baffled by new discoveries in outer space.

The passage mentions that quasars were first discovered in the early 1960s when telescopes picked up mysterious radio-wave emission sources that could not be explained at the time. It also mentions that scientists have not been able to account for the significant energy changes observed in quasars. This information supports the belief that scientists are baffled by new discoveries in outer space. The passage does not support the beliefs that we often make significant discoveries by accident (A), that we will someday know everything about our physical universe (B), that scientists hold the key to all knowledge about outer space (C), or that we really know nothing about our physical universe (E).