8 classes are annotated with ActivityAnswer in Opigno module 3.x

FileUploadActivityAnswer in ActivityTypes/opigno_file_upload/src/Plugin/ActivityAnswer/FileUploadActivityAnswer.php

Class FileUploadActivityAnswer.

H5pActivityAnswer in ActivityTypes/opigno_h5p/src/Plugin/ActivityAnswer/H5pActivityAnswer.php

Class H5pActivityAnswer.

LongAnswerActivityAnswer in ActivityTypes/opigno_long_answer/src/Plugin/ActivityAnswer/LongAnswerActivityAnswer.php

Class LongAnswerActivityAnswer.

ScormActivityAnswer in ActivityTypes/opigno_scorm_activity/src/Plugin/ActivityAnswer/ScormActivityAnswer.php

Class ScormActivityAnswer.

SlideActivityAnswer in src/Plugin/ActivityAnswer/SlideActivityAnswer.php

Class SlideActivityAnswer.

TincanActivityAnswer in ActivityTypes/opigno_tincan_activity/src/Plugin/ActivityAnswer/TincanActivityAnswer.php

Class TincanActivityAnswer.

TrueFalseActivityAnswer in src/Plugin/ActivityAnswer/TrueFalseActivityAnswer.php

Class TrueFalseActivityAnswer.

VideoActivityAnswer in ActivityTypes/opigno_video/src/Plugin/ActivityAnswer/VideoActivityAnswer.php

Class VideoActivityAnswer.