Question

for years, biologists have experimented with using grime - eating bacteria rather than harsh chemicals to clean artworks, and results have been impressive overall. ______ these bacterial strains—which can metabolize centuries’ worth of oil, glue, dirt, and other surface impurities without creating harmful byproducts—have proven more effective than traditional chemical cleaning methods. which choice completes the text with the most logical transition? choose 1 answer: a additionally, b in many cases, c as a result, d however,

Explanation:

The first sentence states that biologists have experimented with bacteria - based cleaning and the overall results are impressive. The second sentence further elaborates on the effectiveness of these bacterial strains. "Additionally" is used to add more information that supports the initial statement. "In many cases" would imply a limitation rather than an addition. "As a result" would suggest a cause - effect relationship which is not the case here. "However" would indicate a contrast which is not present.

Answer:

A. Additionally,