Mark correct statements

MES $$ Manufacturing Execution Systems

ERP $$ Enterprise Resource Planning

BI $$ Business Intelligence

PLC $-$ Programmable Logic Controller

Question $3$Select one or more:

a$.$

Strategic decisions in form of control commands are sent from upper$-$level software$($MES$/$ERP$/$BI$)$ directly to the PLCs$.$

b$.$

Upper$-$level software $($MES$/$ERP$/$BI$)$ typically makes a direct connection to field level sensors

c$.$

Field$-$level sensors$\text{'}$ data is sent in one direction $-$ from PLC to upper$-$level software $($MES$/$ERP$/$BI$)$

d$.$

BI systems typically require data from almost all field$-$level sensors