Actually..... all of them are correct!
The difference is whether the word "the orchestra" needs a plural or singular verb. In American English a singular verb is needed (so American English would only accept options a) and c) ) but in British English both forms are acceptable: so in British English all four sentences are correct.
Information details because they actually help you with your answers in a test or question.
The correct answer should be Leonardo did not intend for his inventions to do harm.
I saw on the Internet that B and D are incorrect, so we have to choose between A and C. A is also incorrect because Leonardo had much greater plans for his inventions that simply to investigate the properties of snow. This leaves us with C as the correct answer - he wanted to advance science, rather than create a bad invention.
Medusa because it would turn him to stone'
