Add punctuation: In 1884 he began to study the effect which magnetization exerts on the polarization of reflected light
A: In 1884 he began to study the effect which magnetization exerts on the polarization of reflected light.
QUESTION: Fix punctuation: David Rittenhouses parents Elizabeth Williams and Matthias Rittenhouse were farmers near Germantown at that time a separate town close to Philadelphia William Rittenhouse built the first paper mill in the British colonies in Germantown in 1690 David showed great promise as a child particularly displaying a talent for constructing mechanical models and showing considerable mathematical skills
ANS: David Rittenhouse's parents, Elizabeth Williams and Matthias Rittenhouse, were farmers near Germantown, at that time a separate town close to Philadelphia. William Rittenhouse built the first paper mill in the British colonies in Germantown in 1690. David showed great promise as a child, particularly displaying a talent for constructing mechanical models and showing considerable mathematical skills.
QUES: For instance while attempting to open a PPT PPTX PPS file you may had come across error messages like Unable to read the file Unknown Error occurred Invalid file path Error 123 sorry file cannot be accessed etc

correct the punctuation.

CORRECTED: For instance, while attempting to open a PPT / PPTX / PPS file you may had come across error messages like "Unable to read the file", "Unknown Error occurred", "Invalid file path", "Error 123 : sorry file cannot be accessed" etc.
Question: 45 of 60 people 75 found this review helpful
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Answer: 45 of 60 people (75%) found this review helpful
Meet German singles online

Can you repeat this sentence, but add in punctuation?
Meet German singles online.
QUESTION: Fix punctuation: C4S files are Uncommon Files primarily associated with Clonk Scenario RedWolf Design GmbH
ANS:
C4S files are Uncommon Files primarily associated with Clonk Scenario (RedWolf Design GmbH).