Then I knew something was up when everything quieted down in the dining room . How suddenly everyone wanted me to clear the table . I could hear whispers and giggling , I kept trying to hold back more and more but finally I was forced into the dining room where they had an ice cream cake ( my favorite from Carvel ) They all insisted on singing Happy Birthday to me .

Q with options: Give answer the following question using evidence from the above passage: What may be the reason for the giggling and the whispering ?
Choose from: 1). They heard they 're getting a car for their birthday .; 2). They are excited about the surprise .; 3). They found out a secret about them .; 4). They heard what they did wrong .;
2).