Why did arthur conan doyle write his first detective story? a. he wanted to be selective himself b. dr. bell ordered him to write one c. he badly needed money d. he had failed out of medical school

C. He badly needed money

When they spot the huge terrifying dinosaur, though, Eckels panics, inadvertently stepping off the path and crushing a single butterfly. That tiny difference is enough to unloose a chain of events so that by the time they get back to the future, it is irreparably changed.