Final answer:
The monitored signal would drop low when a pushbutton is pressed if it is wired in a pull-down resistor configuration, which connects the signal line to the ground via a resistor.
Step-by-step explanation:
For a pushbutton to cause the monitored signal to drop low when pressed, it should be in a pull-down resistor configuration. This type of circuit includes a resistor that is connected between the signal line and ground. When the pushbutton is open (not pressed), the pull-down resistor ensures the signal line is low. However, when the pushbutton is pressed, it connects the signal line directly to a higher voltage (often Vcc), causing the signal to go high instead. There isn't a 'pull-right' or 'pull-left' configuration in this context; these terms are not used in electronic circuit design.
A pull-up resistor pulls the voltage up to the "high" logical level (5V, 3.3V or whatever is used as a "high" level) when the is no signal driving the input. A pull-down resistor pulls the voltage down to the "low" logical level (0V or close to it) when the is no signal driving the input.