Final answer:
The archer ability that has the capability to poison the enemy is Venom Strike. Therefore, the correct option is A.
Step-by-step explanation:
The archer ability that has the capability to poison the enemy they attack is Venom Strike. Venom Strike is an archer ability that applies a poison effect to the enemy, causing damage over time. This ability is often used to weaken and slowly eliminate opponents. Other archer abilities like Rapid Fire, Critical Shot, and Evasive Roll do not have the poison effect.
Therefore, the correct option is A.