Which of the following statements about relationships is not true?
a. relationships have different stages.
b. there are different types of relationships.
c. strong relationships never change.
d. relationships develop at different rates.

The third alternative is correct (C).

Relationships are social forms of contact that develop into an enumeration of complexities, depending on environmental and personal characteristics.

The intensity, form and types of relationship vary according to the characteristics mentioned. However, it is not correct to say that relationships do not change, even though they are very strong. Some intrinsic characteristics are not changeable, however, tastes, ego and even love are mutable over time. That way, the strong relationship can change its intensity or even end.