Did formal anthropology gender and sexuality didn't exist until the 1990 ASA WILL GIVE BRAINLEST

ᴀɴᴛʜʀᴏᴘᴏʟᴏɢɪꜱᴛꜱ ᴀʀᴇ ꜰᴏɴᴅ ᴏꜰ ᴘᴏɪɴᴛɪɴɢ ᴏᴜᴛ ᴛʜᴀᴛ ᴍᴜᴄʜ ᴏꜰ ᴡʜᴀᴛ ᴡᴇ ᴛᴀᴋᴇ ꜰᴏʀ ɢʀᴀɴᴛᴇᴅ ᴀꜱ “ɴᴀᴛᴜʀᴀʟ” ɪɴ ᴏᴜʀ ʟɪᴠᴇꜱ ɪꜱ ᴀᴄᴛᴜᴀʟʟʏ ᴄᴜʟᴛᴜʀᴀʟ—ɪᴛ ɪꜱ ɴᴏᴛ ɢʀᴏᴜɴᴅᴇᴅ ɪɴ ᴛʜᴇ ɴᴀᴛᴜʀᴀʟ ᴡᴏʀʟᴅ ᴏʀ ɪɴ ʙɪᴏʟᴏɢʏ ʙᴜᴛ ɪɴᴠᴇɴᴛᴇᴅ ʙʏ ʜᴜᴍᴀɴꜱ.[2] ʙᴇᴄᴀᴜꜱᴇ ᴄᴜʟᴛᴜʀᴇ ɪꜱ ɪɴᴠᴇɴᴛᴇᴅ, ɪᴛ ᴛᴀᴋᴇꜱ ᴅɪꜰꜰᴇʀᴇɴᴛ ꜰᴏʀᴍꜱ ɪɴ ᴅɪꜰꜰᴇʀᴇɴᴛ ᴘʟᴀᴄᴇꜱ ᴀɴᴅ ᴄʜᴀɴɢᴇꜱ ᴏᴠᴇʀ ᴛɪᴍᴇ ɪɴ ᴛʜᴏꜱᴇ ᴘʟᴀᴄᴇꜱ. ʟɪᴠɪɴɢ ɪɴ ᴛʜᴇ ᴛᴡᴇɴᴛʏ-ꜰɪʀꜱᴛ ᴄᴇɴᴛᴜʀʏ, ᴡᴇ ʜᴀᴠᴇ ᴡɪᴛɴᴇꜱꜱᴇᴅ ʜᴏᴡ ʀᴀᴘɪᴅʟʏ ᴀɴᴅ ᴅʀᴀᴍᴀᴛɪᴄᴀʟʟʏ ᴄᴜʟᴛᴜʀᴇ ᴄᴀɴ ᴄʜᴀɴɢᴇ, ꜰʀᴏᴍ ᴡᴀʏꜱ ᴏꜰ ᴄᴏᴍᴍᴜɴɪᴄᴀᴛɪɴɢ ᴛᴏ ᴛʜᴇ ᴇᴍᴇʀɢᴇɴᴄᴇ ᴏꜰ ꜱᴀᴍᴇ-ꜱᴇx ᴍᴀʀʀɪᴀɢᴇ. ꜱɪᴍɪʟᴀʀʟʏ, ᴍᴀɴʏ ᴏꜰ ᴜꜱ ʟɪᴠᴇ ɪɴ ᴄᴜʟᴛᴜʀᴀʟʟʏ ᴅɪᴠᴇʀꜱᴇ ꜱᴇᴛᴛɪɴɢꜱ ᴀɴᴅ ᴇxᴘᴇʀɪᴇɴᴄᴇ ʜᴏᴡ ᴠᴀʀɪᴇᴅ ʜᴜᴍᴀɴ ᴄᴜʟᴛᴜʀᴀʟ ɪɴᴠᴇɴᴛɪᴏɴꜱ ᴄᴀɴ ʙᴇ. .

the answer is c, all the other options are things they are known for.

hope this ☺️