What was the context for the founding of Daoism? Please help this is due today and I really need help

Lao​ ​Tzu (Chinese​ ​philosopher​)​ ​is​ ​said​ ​to​ ​have​ ​tired​ ​of​ ​life​ ​in​ ​the​ ​Zhou​ ​court​ ​as​ ​it​ ​grew​ ​increasingly​ ​morally corrupt. So​ ​he​ ​left​ ​and​ ​rode​ ​on​ ​a​ ​water​ ​buffalo​ ​to​ ​the​ ​western​ ​border​ ​of​ ​the​ ​Chinese empire.​ ​Although​ ​he​ ​was​ ​dressed​ ​as​ ​a​ ​farmer,​ ​the​ ​border​ ​official​ ​recognised​ ​him​ ​and asked​ ​him​ ​to​ ​write​ ​down​ ​his​ ​wisdom.​ ​According​ ​to​ ​this​ ​legend,​ ​what​ ​Lao​ ​Tzu​ ​wrote became​ ​the​ ​sacred​ ​text​ ​known​ ​as​ ​the​ ​​Tao​ ​Te​ ​Ching​.​ ​After​ ​writing​ ​this​ ​piece,​ ​Lao​ ​Tzu​ ​is said​ ​to​ ​have​ ​crossed​ ​the​ ​border​ ​and​ ​disappeared​ ​from​ ​history,​ ​perhaps​ ​to​ ​become​ ​a hermit. ​In​ ​reality,​ ​the​ ​Tao​ ​Te​ ​Ching​ ​is​ ​likely​ ​to​ ​be​ ​the​ ​compilation​ ​of​ ​the​ ​works​ ​of​ ​many authors​ ​over​ ​time.​ ​But​ ​stories​ ​about​ ​Lao​ ​Tzu​ ​and​ ​the​ ​Tao​ ​Te​ ​Ching​ ​itself​ ​passed​ ​down through​ ​different​ ​Chinese​ ​philosophical​ ​schools​ ​for​ ​over​ ​two​ ​thousand​ ​years. ​​Lao​ ​Tzu​ ​was​ ​the​ ​leading​ ​figure​ ​in​ ​the​ ​spiritual​ ​practice​ ​known​ ​as​ ​Daoism​ ​which​ ​is​ ​more​ ​than​ ​two​ ​thousand​ ​years​ ​old,​ ​and still​ ​popular​ ​today.​ ​There​ ​are​ ​at​ ​least​ ​twenty​ ​million​ ​Daoists,​ ​and​ ​perhaps​ ​even​ ​half​ ​a​ ​billion,​ ​living​ ​around​ ​the​ ​world​ ​now, especially​ ​in​ ​China​ ​and​ ​Taiwan.

Use this reference:

https://www.frontiercsd.org/cms/lib/NY19000265/Centricity/Domain/167/What%20was%20the%20context%20for%20the%20founding%20of%20Daoism.pdf

the answer is b. hope this !

letter d is correct.