Question

within the 2014 restoration of the san bartolomé altarpiece, conservators analyzed pigment composition using raman spectroscopy. the tests revealed a consistent azurite - to - malachite ratio across all panels dated before 1580. ____ this uniformity supports attribution to a single workshop rather than later assemblage, a conclusion reinforced by brushstroke metrics recorded in the toledo conservation report. minor deviations appeared only in sections repaired after 1712.
which choice completes the text with the most logical transition?
a indeed,
b by contrast,
c that is,
d otherwise,

Explanation:

To determine the logical transition, analyze the relationship between the sentences. The first part says there's a consistent pigment ratio before 1580, and the next part explains how this uniformity supports an attribution. "Indeed" is used to emphasize or confirm a preceding statement, which fits here as the second sentence builds on the first's finding. "By contrast" implies a contrast (not present here), "That is" is for rephrasing (not needed), and "Otherwise" implies a conditional alternative (irrelevant). So "Indeed" is the best choice.

Answer:

A. Indeed,