"Carlo Antonio Testore is considered among the most recognized soloist of the double bass" is False
Answer: Option B
Explanation:
The youngest of Carlo Giuseppe's sons was Carlo Antonio Testore, and his instruments still show Grancino's mark visible in his father's work. The work of Carlo Antonio in general seems hasty and less distinct, often with misleading purfling on the back and flat-backed pegboxes.
This lack of execution sophistication may have resulted from his father's very premature death, which left Carlo Antonio and his brother Paolo, 16, in charge of the company. At the end of his career Carlo Antonio's son Giovanni supported him.