Secondary; The events are 100 years apart. There is virtually no chance of it being primary.
David was created by Italian early Renaissance sculptor Donato di Niccola di Betto Bardi, better known as Donatello. In 1408, Donatello was commissioned by the operai of the cathedral of Florence. The young David was seen as an effective political symbol and religious hero.
My guess is b. Muhammad tughluq...... Sorry if it's wrong but I really think it is b.
The Standard Oil company.
Answer:
B. He greatly improved existing steam engines for use in factories.
Explanation:
James Watt made important changes to the design of the steam engine, which increased efficiency and made steam engines cheaper to run.