John’s phone bill consists of a \$40$40 monthly fee, which includes 2020 minutes of talk time. For every minute after the first 2020 minutes of talk time, John will be charged \$0.10$0.10 per minute. If tt is the number of minutes in a month that John talks on his phone, and t > 20t>20 , which of the following functions correctly expresses John’s monthly cost in dollars, CC , in terms of tt .