China was itself an established empire and could not be conquered the same way as they did Africa and India.
What you are saying is basically equal to saying why not land in England (during that period) and turn everyone into slaves.
Since that is impossible, establishing spheres of influence allows major powers to break China from the inside.
The major powers of europe, Japan, and America ganging up on china during those days is the main reason behind China's firm foreign policy today.
So you can live :/ I guess
1861 Creation of the Confederate States of America
Both C and D were both male rulers, so we can rule them out.
Next comes Hatshepsut and Cleopatra.
Cleopatra was a co-regent. Even though she was a very strong person of history, Hatshepsut takes the answer.
Hatshepsut ruled for a whopping 20 years, making her considered one of the most successful female Egyptian rulers.
Hope this helps!