Take context from the input text and decide on the accurate relationship between 'Stratasys' and '3D printing' from the options provided.
Options: parent organization, director/manager, industry, product/material produced

MakerBot's performance Over the last two quarters, MakerBot's performance has become a sensitive subject for Stratasys because the consumer 3D printing unit's revenue growth rate has fallen off a cliff since the third quarter of last year: Source: Stratasys
industry