• This question tests the knowledge of Reflexive Pronouns (and their use as Emphatic Pronouns). A reflexive pronoun must always match the subject of the sentence.
The Subject is "We": Since the sentence starts with "We" (first-person plural), the corresponding pronoun must be "ourselves."
The Function: Here, "ourselves" is used to emphasize that the group (We) is doing the work alone, without any outside assistance.
Oneself: This is used for a generic, unnamed person (e.g., "One must take care of oneself"). It does not match the specific subject "We."
Itself: This is used for singular objects or animals (e.g., "The cat cleaned itself").
Themselves: This is used for the third-person plural subject "They" (e.g., "They finished the project themselves").