Two technicians are discussing back pressure. technician a says that higher exhaust-system pressure leads to lower manifold vacuum. technician b says that back pressure can be tested with an oxygen sensor, and egr valve, or an air valve. who is correct? a. technician ab. both technicians a and bc. neither technician a nor bd. technician b

Why were the articles of confederation replaced with the constitution? a. the articles of confederation did not vice strong power to the federal government. b. the articles of confederation did not create a government structure for the states. c. the articles of confederation did not provide powers for strong individual state governments. d. the articles of confederation did not allow the federal government to deal with foreign countries.