Answer:
C. newtons/meter
Step-by-step explanation:
The units for the spring constant, often denoted as 'k', are Newtons per meter (N/m) in the International System of Units (SI). This unit represents the force required to stretch or compress the spring by one meter. Specifically, if a spring has a spring constant of 'k' Newtons per meter, it means that it takes 'k' Newtons of force to stretch (or compress) the spring by one meter from its equilibrium position.