Molecular clock analysis can provide which of the following:

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The question asks what molecular clock analysis can provide. 
Option a: 'The genome of ancient organisms' is not something molecular clock analysis yields. Molecular clocks estimate timing, not reconstruct entire ancient genomes; genomes are inferred or sequenced from preserved material when available, not dated by the clock itself.
Option b: 'Numerical ages for rocks with no fossils' is a mismatch. Dating rocks without fossils typically relies on radiometric methods (e.g., uranium–lead, potassium–argon), not molecular clock approaches, which rely on genetic change over time within lineages.
Option c: 'Numerical ages for rocks with fossils' seems plausible at first glance because fossils can calibrate clocks, but the molecular clock does not directly provide numerical ages for rocks themselves; it provides divergence times between lineages, often using fossil calibrations to estimate those times. The phrase implies dating rocks directly, which is not the primary output of a molecular clock.
Option d: 'The age of divergence between different groups of organisms' is precisely what a molecular clock is designed to estimate: the time since two or more lineages split from a common ancestor, using rates of genetic change and calibrations from fossils or other data.
Putting it together, the core utility of molecular clock analysis is to infer when lineages diverged, not to date entire genomes, the age of rocks without fossils, or to provide direct rock ages. The best-supported choice among the options is the one that describes estimating divergence times between lineages, which corresponds to option d.

Molecular clock analysis can provide which of the following:

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