QUESTION: Fix punctuation: This allows the intelligence of Windows to decide the correct software application to open your A2 file
ANS: This allows the intelligence of Windows to decide the correct software application to open your A2 file.

QUESTION: Fix punctuation: granny black interracial mature old and young 18 blonde
ANS: granny, black, interracial, mature, old and young (18+), blonde

QUESTION: Fix punctuation: An agreement called the Kyoto Protocol between the industrialized countries created in 2001
ANS: An agreement called the Kyoto Protocol between the industrialized countries created in 2001.

QUESTION: Fix punctuation: What we neither know is how they mounted these Guaras between the balsa trunks
ANS:
What we neither know is how they mounted these Guaras between the balsa trunks.