Since the adjective cansados (tired) is used in the plural form, we need to form its superlative also in the plural form.
Cansados (tired) - cansad<span>ísimos (extremely tired).
Also, this adjective is used in the masculine gender.</span>
The answer is main clause
Technology has gotten much better since the 1920s
I believe that it is
C. When the three girls walk down the street
