Dark matter and dark energy have both been postulated by astrophysicis

(A) Dark matter and dark energy can be directly identified.

INCORRECT Out of scope. The identification process of dark energy is not mentioned in the passage while identification of dark matter through direct or indirect methods is mentioned.

(B) Astrophysicists are ignorant of many important details of the universe’s composition.

INCORRECT Human ignorance is mentioned in the last sentence of the passage but there is no mention of astrophysicists ignorance.

(C) Although not well understood, dark matter and dark energy help reconcile theory with observation.

Correct Astrophysicists postulate dark matter and dark energy to fill a gap. The dark matter and dark energy are not easily detected. This expresses the central idea of the passage.

(D) Despite a recent observation, the existence of dark matter and dark energy is still debated in the scientific community.

INCORRECT There is no mention of any "recent observation" in the passage. The passage doesn't mention any debate around the existence of dark matter and dark energy

(E) Dark matter and dark energy were suggested by Einstein’s Theory of Relativity.

INCORRECT Dark matter and dark energy were suggested by astrophysicists and not Einstein.



(A) They explain why the universe may be 25 times denser than has been observed.

Correct Theory of Relativity predicts that the density of the universe is about 25 times greater. There is no mention of dark matter or dark energy explanining the reason for this density.

(B) They are thought to account for 96% of the universe.

INCORRECT This option is true based on "about 22% is thought to be composed of dark matter and the remaining 74% is thought to be dark energy"

(C) They are not well understood by physicists.

INCORRECT This option is true in saying many aspects of dark matter and dark energy are not well understood. The passage does mention many aspects of dark matter remain speculative.

(D) Their existence can be deduced from observations such as unexpected mass distributions.

INCORRECT This is stated in the passage. "The presence of dark matter must be inferred through its indirect manifestations: the unusual distribution of mass in a star system known as the Bullet Cluster."

(E) They may solve the puzzle of the missing mass.

INCORRECT This is mentioned in the first line of the passage. "Dark matter and dark energy have both been postulated by astrophysicists to fill a gap in the fabric of the cosmos which is known as the puzzle of the missing mass."



(A) The Theory of Relativity does not adequately account for them.

INCORRECT The passage doesn't specify any relation between Theory of Relativity and anomalous gravitational effects. They are mentioned in the passage in different contexts.

(B) Their appearance is not understood by physicists.

INCORRECT Their appearance is understood by physicists and linked to the presence of dark matter.

(C) They may explain the puzzle of the missing mass.

INCORRECT They may explain the dark matter and not the puzzle of missing mass.

(D) Without the existence of dark matter, they cannot be satisfactorily explained.

Correct The anomalous gravitational effects have been linked to the presence of dark matter. WIthout the existence of dark matter, they cannot be satisfactorily explained.

(E) They are related to the distribution of mass in the Bullet Cluster.

INCORRECT The anomalous gravitational effect and the Bullet Cluster are not linked to each other. They both help explain the presence of dar matter.