Between section 1 and 2 of a pipe a pump, a heater, a very rough pipe and an orifice plate are placed. The Bernoulli equation can be applied between 1 and 2 if

• A. Orifice plate and heater are removed
• B. Heater pump and heater are removed
• C. Heater and pump are removed
• D. Heater, rough pipe and orifice plates are removed