Which offenses can lead to a red card?

The option indicated as the correct answer refers to two specific scenarios that can result in a red card: using offensive language and receiving a second yellow card. The issuance of a red card for the second yellow card occurs when a player has already been cautioned once during the match and receives another yellow card, which automatically results in a dismissal from the match.

Using offensive language can lead to a direct red card as it is considered inappropriate behavior that goes against the spirit of the game. Such conduct is taken seriously by referees as it undermines respect for opponents and referees alike.

Other offenses mentioned in the question—like serious foul play, unsporting behavior, and violent conduct—can also lead to a red card but are covered by different rule sets. For instance, serious foul play or violent conduct typically leads to a direct red card due to the nature and severity of the act. Unsporting behavior can lead to a yellow card but not directly to a red card unless compounded by other infractions such as a second yellow.

Thus, the option highlighting offensive language and the consequence of a second yellow card accurately represents offenses that lead to a red card under the laws of the game.