Which of the Following Is a Disadvantage of Gradually Introducing

Which of the following is a disadvantage of gradually introducing a new product to a market?

A) It increases the risk of introducing a new product.
B) It makes a firm more susceptible to losses.
C) It prohibits fine-tuning of the marketing mix often leading to customer dissatisfaction.
D) It allows competitors to monitor the results of the new product.
E) It prevents product differentiation based on geographical differences.