Answer the multiple choice question on the picture

In the case of Bangladesh's garment industry discussed in class, which of the following is NOT a reason for the growth of Bangladesh's garment industry from $55,050 in 1980 to $2 billion in the 2000s? a. Knowledge of garment production spread quickly in Bangladesh. b. Ideas are highly excludable. O c. Ideas are nonrivalrous. d. Production of ideas features increasing returns to scale