Please help me with these questions. I don't need detailed explanations and calculations (just ABC) but if it is feasible, please post your draft! Please be careful, most of the time, experts give me many wrong answers (especially in Sta and Pro). Thanks so much, my pro!!!

A manufacturer claims that a particular automobile model will get 50 miles per gallon on the highway. The researchers at a consumer-oriented magazine believe that this claim is high and plan a test with a simple random sample of 30 cars. The sample mean is 49 miles per gallon. Assuming the population standard deviation is 2.3 miles per gallon, 13. The researchers can conclude (if the sample mean is 49 miles per gallon): (A) There is not sufficient evidence to reject the manufacturer's claim; 49 miles per gallon is too close to the claimed 50 miles per gallon." (B) The manufacturer's claim should not be rejected because the P-value of .0086 is too small. (C) The manufacturer's claim should be rejected because the sample mean is less than the claimed mean (D) The P-value of .0086 is sufficient evidence to reject the manufacturer's claim. (E) The P-value of .0086 is sufficient evidence to prove that the manufacturer's claim is false