When Betty found Emily on Betty's used car lot looking at an SUV, she introduced herself and then showed her the features of the vehicle. After a period of time they discussed the
price, and then she opened the driver's door for him. As she slid behind the wheel, she said,
"Tell you what, I believe that once a customer gets behind the wheel of one of these beauties,
she's sold. So, if you don't say anything in the next 10 seconds, we've got a deal at $15,750."
Emily said nothing within the 10 seconds.
a. Did Emily legally agree to Betty's offer by her silence? Explain.