Question

every chemical compound has a spectroscopic fingerprint, a pattern of reflected light unique to that compound. ______ upon analyzing the light reflected by the bright regions on the surface of the dwarf planet ceres, maria cristina de sanctis of romes national institute of astrophysics was able to determine that the regions contain large amounts of the compound sodium carbonate.
which choice completes the text with the most logical transition?
choose 1 answer:
a regardless,
b meanwhile,
c thus,
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Explanation:

The first sentence states that every chemical compound has a unique spectroscopic fingerprint. The second sentence shows that analyzing light (using the fingerprint concept) led to determining the compound on Ceres. "Thus" indicates a cause - effect relationship. "Regardless" shows contrast which is not here. "Meanwhile" shows simultaneous events which is not the case.

Answer:

C. Thus.