Final answer:
The margins for different price ranges and the percentage for margins below 5k are provided in the answer.
Step-by-step explanation:
The question asks about the margins for different price ranges and the percentage to be applied for margins below 5k. For margins of 5k-10k, the answer is $2 per share. For margins of 0-5k, the greater of 100% or $1 per share should be used.
Therefore, the correct answer is D) $4, 100%.