"Led to fear of potential sabotage and espionage by Japanese Americans...” is the excerpt from the passage which best supports the inference that Japanese Americans were oppressed and mistreated after the attack on Pearl Harbour.
Answer: Option A
<u>Explanation:
</u>
As the passage mentions, many Japanese Americans were targeted on grounds of suspicion by the Americans on grounds like causing destruction and spying. This phrase actually talks about what actually happened to the Japanese Americans and on what grounds they were targeted.
Here, it is specified which part of the population were targeted, so there is a specific claim for that. The opening part of the sentence said that the attack on Pearl Harbour intensified racial prejudices, which implies that Japanese Americans might have already been victims of being stereotyped before the incident happened.