In a random digit telephone survey, homeless people or people with only cell phones do not have telephones that can be called with random digit dialing. what type of bias is this? select one:
a. undercoverage biasb. non-response biasc. response bias due to respondent lying or deliberately giving incorrect information. d. response bias due to question wordinge. response bias due to interviewer influences

What did i do wrong with this const discord = require('discord.js'); var bot = new discord.client(); const token = 'ntm3mjcxmtu1mjg3ote2ntq2.dyogew.dpfiwfpuifzuzvifop-csuxasnm' const prefix = "! " bot.registry.registergroup('simple', 'simple'); bot.registry.registerdefaults(); bot.registry. + '/commands'); bot.on('message', message => { if(message.content == 'hi! ') { message.channel.send ('@everyone sup, how is @everyone day going'); } if(message.content == 'h3lp') { message.channel.send ('dose not have any commands yet'); } bot.on('ready', function() { console.log("ready") }); bot.login(token);