Answer B: I just took the test
ɪɴᴄᴏᴍᴘʟᴇᴛᴇ ᴅᴏᴍɪɴᴀɴᴄᴇ ᴏᴄᴄᴜʀꜱ ᴡʜᴇɴ ᴛʜᴇ ᴘʜᴇɴᴏᴛʏᴘᴇ ᴏꜰ ᴀ ʜᴇᴛᴇʀᴏᴢʏɢᴏᴛᴇ ᴏꜰꜰꜱᴘʀɪɴɢ ɪꜱ ꜱᴏᴍᴇᴡʜᴇʀᴇ ɪɴ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ᴘʜᴇɴᴏᴛʏᴘᴇꜱ ᴏꜰ ʙᴏᴛʜ ʜᴏᴍᴏᴢʏɢᴏᴜꜱ ᴘᴀʀᴇɴᴛꜱ; ᴀ ᴄᴏᴍᴘʟᴇᴛᴇʟʏ ᴅᴏᴍɪɴᴀɴᴛ ᴀʟʟᴇʟᴇ ᴅᴏᴇꜱ ɴᴏᴛ ᴏᴄᴄᴜʀ.
The CO2 comes from the atmosphere. It is dissolved within our blood cells and is breathed out through respiration
