Characteristics of the introduction phase

What are characteristics of the introduction phase of the product life cycle?
a
Low sales, high cost per customer, negative profits, innovators, few competitors
b
Peak sales, low cost per customer, high profits, innovators as customers, relatively stable number of competitors
c
Peak sales, low cost per customer, declining profits, mainstream adopters, relatively stable number of competitors
d
Declining sales, low cost per customer, high profits, mainstream adopters, relatively stable number of competitors
e
Peak sales, low cost per customer, high profits, mainstream adopters, relatively stable number of competitors