A tailor uses two rulers of lengths 40 cm and 50 cm to take measurements. Zeynep ordered 6 meters of fabric from this tailor. The tailor prepared this order thinking he was using the 50 cm ruler, but mistakenly used the 40 cm ruler.
Due to this measurement error, how many meters less fabric did Zeynep receive than she should have?\\
A) 0.8\\
B) 1\\
C) 1.2\\
D) 1.5\\
E) 1.8