[单选题]
At what temperature are the numerical ry..mn:ri lp7hc72x7 gh cqxs4 /zb. 5h (;huac a;oqq56dkduneadings on the Fahrenheit and Celsius scales the s6u u5dqdak5h. a;;h( qz/bcno ame?
A. $-30^{\circ}$
B. $-40^{\circ}$
C. $-50^{\circ}$
D. $-60^{\circ}$
