For a 4-bit parallel adder, if the carry-in is connected to a logical HIGH, the result is Select one: O a. The same as if the carry-in is tied LOW since the least significant carry-in is ignored O b. That carry out will always be HIGH O c. A one will be added to the final result O d. The carry-out is ignored In a multiplexer the output depends on its Select one: O a. Data inputs O b. Select inputs O c. Select outputs O d. Enable pin