Hey guys.. I am applying to Waterloo this Fall 2019 and confused in choosing between these.. for MMa

Hey guys.. I am applying to Waterloo this Fall 2019 and confused in choosing between these.. for MMath (MS for Waterloo) My main focus was co-op and jobs after wards 1. Computer science (coursework) 2.Computer science ( thesis) 3. Data science 4. Data science & Artificial intelligence with co-op I don't think co-op option is left for CS as it's not showing ... please help... if anyone has any info .