You're machining a rush part for a repair order from a scale drawing print given to you by the project engineer. As you begin to machine an end feature, you find a dimension missing. To produce the part on time, you could A) approximate the dimension as best you can based on the way the part must look and function. B) use a precision scale to determine the missing dimension from the print. C) assume that since the dimension is missing it isn't critical D) go back to the project engineer or drafter to get true dimension.