Which of the following factors would be mo
题型：单项选择题
问题：
Which of the following factors would be most important in selecting the needle length to use for a subcutaneous injection of hydromorphone hydrochloride
A．The diameter of the needle.
B．The amount of adipose tissue at the administration site.
C．The amount of medication to be administered.
D．The viscosity of the solution to be injected.