1. the earliest washing machines were created in 1797. 2. they looked a lot like giant wooden boxes. 3. the first step to washing clothes was to fill the box with soap and water. 4. next, a huge cumbersome crank had to be turned manually. which sentence contains coordinate adjectives that should be separated by a comma? a) sentence 1 b) sentence 2 c) sentence 3 d) sentence 4