One perplexing result of General Relativity is the prediction
that gravitational singularities lie at the hearts of black holes,
a point where the laws of physics no longer seem to apply,
and that has been supported by subsequent research.(A) One perplexing result of General Relativity is the prediction that gravitational singularities lie at the hearts of black holes,
a point where the laws of physics no longer seem to apply, and that has been supported by subsequent research.
a point refers to
gravitational singularity and not to
black holes. Incorrect
(B) One perplexing result of General Relativity is the prediction
at the heart of each black hole of a gravitational singularity, a point at which the laws of physics no longer seem to apply,
but a prediction that has been supported by subsequent research.
The prediction at the heart of each black hole of a gravitational singularity does not make sense since prediction is not at the heat of each black hole.
Incorrect
(C) One of the perplexing results of General Relativity is the prediction,
supported by subsequent research,
that at the heart of each black hole lies a gravitational singularity,
a point at which the laws of physics no longer seem to apply.
Correct
(D) The prediction
of a gravitational singularity at the heart of each black hole,
a perplexing result of General Relativity but one that is supported by subsequent research, is a point where the laws of physics no longer seem to apply.
The prediction is a point where the laws of physics no longer seem to apply does not make sense since Gravitational singularity is a point where the laws of physics no longer seem to apply
Incorrect
(E) The prediction that at the heart of each black hole lies a gravitational singularity,
a point at which the laws of physics no longer seem to apply,
is a perplexing result of General Relativity but
supported by subsequent research.
is a perplexing result of General Relativity but
supported by subsequent research. is incorrect since
is a perplexing result of General Relativity but is supported by subsequent research. is correct
Option C conveys the meaning in a better way than option E.
IMO C