Which two changes allow Assign1 to work with the current values of InputVariable andOutputVariable?

Consider the current values of BPEL variables InputVariable andOutputVariable:

Then consider the following BPEL activity Assign1:
<assign name=”Assign1”><!- – Line 1- ->
<copy><!- – Line 2 – ->
<from variable =”InputVariable”<!- – Line 3 – ->
part = “query_Input”<!- – Line 4 – ->
query=”/ns2: query_Input/ns2:Row_Id”/><!- – Line 5 – ->
<to variable =”OutputVariable”<!- – Line 6 – ->
part = “query_Output”<!- – Line 7 – ->
query=”/ns2: query_Outnput/ns2:RowId”/><!- – Line 8 – ->
</copy><!- – Line 9 – ->
</assign><!- – Line 10 – ->
Which two changes allow Assign1 to work with the current values of InputVariable
andOutputVariable?

A.
adding the attributebpelx :insertMissingToData=”yes”to line 2

B.
adding the attributebpelx :insertMissingFromData=”yes”to line 2

C.
correcting the namespace prefixes in line 5

D.
correcting the namespace prefixes in line 8