As I imagine that I’m standing at the edge of the cliff looking at a chasm I can envision the bottom being a mining territory and that I can possibly extract precious minerals from it. Or that the view is so overwhelming that I would buy a helicopter and take tourists to this site so I can earn some money. Of course if I look down at the chasm I will marvel at it because it’s so terrifyingly deep and at the same time intriguing. It’s a work of God, how could someone not feel something being at such a dangerous height?
You could write about the Taiping Rebellion. Basically what happened was a Chinese dude name Hong Xiuquan decided that he was Jesus's young brother, started his own religion and tried to take over China to create the Taiping Heavenly Kingdom.
B, present because as you eliminate your options (future and past) the only options left are present and present perfect and the form of present perfect is [has/have + past participle] so the last answer is present.
