According to the convoy model of social relations, identify an accurate statement about a convoy.
a) An individual's convoy only consists of relationships that are conjugal in nature.
b) An individual is born without a convoy but gradually acquires social relationships as he or she goes through life.
c) Members of an individual's convoy are completely different at each stage of the life course, from birth to old age.
d) Members of an individual's convoy provide tangible assistance as well as emotional support.