IPv6 shorthand notation allows for the removal of leading zeroes in each 16-bit block of the address and the substitution of a single continuous string of zero blocks with ''. The address '2001:0db8:0000:0000:0000:ff00:0042:8329' becomes '2001:db8ff00:42:8329'. This maintains all necessary information while greatly simplifying the written form of the address. The incorrect choices either fail to correctly compress the address or alter its meaning by misapplying shorthand rules.