Token:
1. something intended or supposed to represent or indicate another thing or an event; a sign; a symbol; as, the rainbow is a token of god's covenant established with noah.
2. a memorial of friendship; something by which the friendship of another person is to be kept in mind; a memento; a souvenir.
3. something given or shown as a symbol or guarantee of authority or right; a sign of authenticity, of power, good faith, etc.
4. a piece of metal intended for currency, and issued by a private party, usually bearing the name of the issuer, and redeemable in lawful money. also, a coin issued by government, esp. when its use as lawful money is limited and its intrinsic value is much below its nominal value.

which is the correct meaning for token as it is used in this sentence?

vainly he hopes for the muskellunge who has just gone somewhere else, but, by the same token, the sure-enough angler is ready to go out next morning, rain or shine, at sunrise.
a) definition 1
b) definition 2
c) definition 3
d) definition 4