Q20 Which two are true about data type conversions involving these columns in query expressions?

Q20 The INVOICE table has a QTY_SOLD column of data type NUMBER and an INVOICE_DATE column of data type DATE.

NLS_DATE_FORMAT is set to DD-MON-RR.

Which two are true about data type conversions involving these columns in query expressions? (Choose two.)

• (A). CONCAT (qty_sold, invoice_date) : requires explicit conversion
• (B). invoice_date = ’15-march-2019′ : uses implicit conversion
• (C). invoie_date > ’01-02-2019′ : uses implicit conversion
• (D). qty_sold BETWEEN ‘101’ AND ‘110’ : uses implicit conversion
• (E). qty_sold = ‘0554982’: requires explicit conversion