Grading policy change due to current health crisis and its impact on college application

My school has offered two options for the current semester (I am a HS Junior) – Pass/Fail grade which will not affect GPA and Letter grade based on what I had before (pre-pandemic grade) the classes changed to online version. The problem is that the grades on some of my advanced level classes are not that great, but I was hoping to raise them up to B+s or A-s eventually. However, the current situation jeopardized everything. Let me know what I option I should go for that won’t bite me later during the college admission process. I am also curious to know what other kiddos are doing. Thanks!