Buoyed by these visions of the future of his son, the artist soldiered on.

Answer: Option A

Persevere : continue in a course of action even in the face of difficulty or with little or no indication of success.
Stopped : (of an event, action, or process) come to an end; cease to happen.
Struggle : make forceful or violent efforts to get free of restraint or constriction.
Fought : take part in a violent struggle involving the exchange of physical blows or the use of weapons.
Soldiered : carry on doggedly; persevere.

Synonym of Soldiered is Persevere