Select the sentence that has the correct use of spellings from the given options.
1
While the negociation process was complex and at times contentious, the two sides ultimately reached a mutually benificial aggreement.
2
While the negotiation process was complex and at times contentious, the two sides ultimately reached a mutually beneficial agreement.
3
While the nagotiation process was complex and at times contencious, the two sides ultimately reached a mutually beneficial agreement.
4
While the negotiation process was complex and at times contencious, the two sides ultimately reached a mutually beneficial aggreement.