A 54-year-old female is treated for essential hypertension with an antihypertensive that control her blood pressure. One day, she comes to the ED with chest pain, tachycardia, anxiety, and a blood pressure of 240/140 mmHg. She has not taken her medication for two days. Which antihypertensive can account for her findings? ()
选项：

A:Clonidine
B:Prazosin
C:Doxazosin
D:Minoxidil